Hang on, I just thought of something.
Does the Galactic Empire get IG-88? IIRC, IG was a creation of the Empire. Would IG take part in this?
Don't even get me started on IG-88.
Answer: No. IG-88A went rouge seconds after he was activated, taking his four "brothers" with him. The bounty hunter employed by the Empire is IG-88B, but the other three IG-88s were all plotting a droid revolution, which would have (theoretically) destroyed the Empire.
If IG-88 is involved, he'll be secretly plotting against the Empire from the very start. Seeing as the Sith Empire has more droids, he would probably side with them anyways.